Arrayed waveguide grating
US7539368B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 3, 2008 |
| Grant date | May 26, 2009 |
| Priority date | — |
| Expiry date | Mar 3, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/12014
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An arrayed waveguide grating has optical input waveguides, a first slab waveguide, an arrayed waveguide comprising plural waveguides of mutually-different lengths, a second slab waveguide and plural optical output waveguides. The first slab waveguide is divided along division surfaces crossing the light path into divided slab waveguides. The divided slab waveguide is temperature-dependently moved along the division surfaces by sliding members which are formed of members exhibiting different expansion/contraction corresponding to temperature change. The sliding members are configured to move the divided slab waveguide in their respective mutually-different temperature ranges in the operating temperature range of the arrayed waveguide grating. A sliding distance of the divided slab waveguide is used as a temperature-dependence reduction amount that varies as temperature changes so as to reduce the temperature difference of the light transmission center wavelength of the arrayed waveguide grating.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.